Download or read book Repeated Manual Release in a Young Plantation written by Philip M. McDonald and published by . This book was released on 1994 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Douglas-fir seedlings on the Arcata Resource Area, Bureau of Land Management, U.S. Department of the Interior, in central coastal California, were released by chain sawing and grubbing competing vegetation around them at different frequencies (0, 2, and 3 grubbings) over a 5-year period. After 5 years, average Douglas-fir stem diameter (measured at 12 inches above mean groundline) of seedlings grubbed at ages 1,2, and 5 was 0.91 inches, and of seedlings grubbed after the first and fifth growing season was 0.95 inches. Both were significantly larger than counterparts in the control (0.57 inches). Tanoak, the most competitive species, constituted 84 percent of total plant cover in the control after 5 years, but only 25 percent on treated plots. Combined shrubs varied little between the untreated control and treated plots and averaged about 7 percent of total foliar cover. Grasses were not present in the control and only for the fifth year in treated plots. The most abundant forb, a hedge nettle, increased greatly in density in both control and treated plots. These relationships and others denoted in the paper yield valuable ecological information on species and community dynamics in both a natural and treated environment. Crew time (no overhead or travel costs) for the three grubbings was 52 hours and for the two grubbings was 44 hours.
Download or read book Vegetation Trends in a Young Ponderosa Pine Plantation Treated by Manual Release and Mulching written by Philip M. McDonald and published by . This book was released on 1997 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vegetation Trends in a 31 year old Ponderosa Pine Plantation written by Philip M. McDonald and published by . This book was released on 1997 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology and Development of Douglas fir Seedlings and Associated Plant Species in a Coast Range Plantation written by Philip M. McDonald and published by . This book was released on 1999 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Visitor Perceptions of Crowding and Discrimination at Two National Forests in Southern California written by Deborah J. Chavez and published by . This book was released on 1993 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1975 with total page 2834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Paper PNW written by and published by . This book was released on 1978 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Abstracts written by and published by . This book was released on 1995-05 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forestry Research West written by and published by . This book was released on 1993 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications Quarterly List written by and published by . This book was released on 1994 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications List written by and published by . This book was released on 1993 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Mixed Shrub tanoak Douglas fir Community in a Treated and Untreated Condition written by Philip M. McDonald and published by . This book was released on 1996 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Tanoak Tree written by Frederica Bowcutt and published by University of Washington Press. This book was released on 2015-06-08 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tanoak (Notholithocarpus densiflorus) is a resilient and common hardwood tree native to California and southwestern Oregon. People’s radically different perceptions of it have ranged from treasured food plant to cash crop to trash tree. Having studied the patterns of tanoak use and abuse for nearly twenty years, botanist Frederica Bowcutt uncovers a complex history of cultural, sociopolitical, and economic factors affecting the tree’s fate. Still valued by indigenous communities for its nutritious acorn nut, the tree has also been a source of raw resources for a variety of industries since white settlement of western North America. Despite ongoing protests, tanoaks are now commonly killed with herbicides in industrial forests in favor of more commercially valuable coast redwood and Douglas-fir. As one nontoxic alternative, many foresters and communities promote locally controlled, third-party certified sustainable hardwood production using tanoak, which doesn’t depend on clearcutting and herbicide use. Today tanoaks are experiencing massive die-offs due to sudden oak death, an introduced disease. Bowcutt examines the complex set of factors that set the stage for the tree’s current ecological crisis. The end of the book focuses on hopeful changes including reintroduction of low-intensity burning to reduce conifer competition for tanoaks, emerging disease resistance in some trees, and new partnerships among tanoak defenders, including botanists, foresters, Native Americans, and plant pathologists. Watch the book trailer: https://www.youtube.com/watch?v=xzY7QxOiI8I
Download or read book Growth and Allocation of Woody Biomass in Forest Trees Based on Environmental Conditions written by Luigi Todaro and published by MDPI. This book was released on 2021-04-23 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest ecosystems are important because of the key role in reducing atmospheric greenhouse gas concentrations by storing a large amount of carbon in biomass and soils. The relative amount of above-ground biomass allocated among different tree tissues is a functional indicator of forests’ health reflecting the material flow, the wood quality and the plant survival strategy. The way in which plants steer their photosynthetic product across their compartments is not fixed but likely vary over time, across growth economies and among species and, lastly, is influenced by plant size and climate, Obtaining a qualitative/quantitative understanding of the influence that these factors have in both growth and biomass allocation is of fundamental importance either in understanding plant ecology and evolution and into developing environmental policies and useful forest management practices to cope with future climate change.
Download or read book Ecology Abstracts written by and published by . This book was released on 1995 with total page 1022 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrindex written by and published by . This book was released on 1995 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1995 with total page 1732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
